• KIEAE Journal
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• 제6권1호
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• pp.33-38
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• 2006

The purpose of this study is to investigate the concentration of sea-salt distribution giving great characteristic environmentally. Therefore the field measurement was conducted to target high-rise apartments constructing in reclaimed land of Busan and measured the concentration of sea-salt by means of distance and height of high-rise apartments from coast. The results of this study were as follows ; 1) The more a horizontal distance is far from coast, the more concentration sea-salt become low. But this study can not draw conclusion exactly as differ from a tendency of the thing close to the coast and the land. 2) In the near seaside, No.132 apartment accords existing research result that in difference of the concentration of sea-salt by height, the more height is high, the more that is high. But in seaside, No.117 apartment of middle point appears that the upper story and the lower story than middle story. Once more, in inland, No.132 apartment and No.117 apartment tend toward opposite it of the seaside. The reason that the result of this measurement and existing study is not agreement is thought that it occurs to turbulent flow between apartments by construction of high-rise apartments group.

• 한국콘텐츠학회논문지
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• 제13권7호
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• pp.120-130
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• 2013

본 연구는 2008년 이후 본격적으로 진행되고 있는 음식과 관련된 스토리텔링에 대한 연구를 고찰하여 내용을 분석하였다. 이를 바탕으로 음식을 매개로 소비자와 소통할 수 있는 새로운 스토리의 구성 전략에 대해 논하고자 한다. 그간 스토리텔링의 연구를 살펴보면 스토리의 소재 발굴 및 필요성 강조의 연구, 스토리를 통한 음식 개발 및 관광 상품화 방안을 제시하는 연구가 주를 이루었다. 또 스토리텔링에 의한 소비자의 태도를 살펴보는 연구가 서서히 진행되고 있으나 음식 관련 스토리를 창작하기 위한 스토리의 내용 구성에 대한 연구는 전무한 실정이다. 따라서 오늘날까지 전해져 내려오는 또는 새롭게 창작된 스토리를 내용에 따라 version 1.0, 2.0, 3.0으로 나누어 분석하였으며, 최종적으로 우리가 앞으로 지향해야할 음식 스토리텔링의 새로운 version 4.0을 제시하고자 한다. 이는 음식 스토리텔링 창작 분야의 새로운 패러다임을 제공하게 될 것이다.

• Structural Engineering and Mechanics
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• 제77권6호
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• pp.721-734
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• 2021

The seismic analysis of structures without applying the effects of soil can undermine functional objectives of structure so that it can affect all the desired purposes at the design and control stages of the structure. In this research, employing OpenSees and MATLAB software simultaneously and developing a definite three-dimensional finite element model of a high-rise concrete structure, designed using performance-based plastic design approach, the performance of Tuned Mass Damper (TMD) and Active Mass Damper (AMD) is both examined and compared. Moreover some less noted aspects such as nonlinear interaction of soil and structure, uplift, nonlinear behavior of structure and structural torsion have received more attention. For this purpose, the analysis of time history on the structural model has been performed under 22 far-field accelerogram records. Examining a full range of all structural seismic responses, including lateral displacement, acceleration, inter-story drift, lost plastic energy, number of plastic hinges, story shear force and uplift. The results indicate that TMD performs better than AMD except for lateral displacement and inter-story drift to control other structural responses. Because on the one hand, nonlinear structural parameters and soil-structure interaction have been added and on the other hand, the restriction on the control force applied that leads up to saturation phenomenon in the active control system affect the performance of AMD. Moreover, the control force applied by structural control system has created undesirable acceleration and shear force in the structure.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2008년도 춘계학술발표대회 논문집
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• pp.427-430
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• 2008

The present study is a preliminary research improving the dwelling quality of apartment house as a kind of multi-family housing. The purpose of the study is to find out the present condition on noise level and types including residents' living noise in apartment units. The method was field survey consisted of field measurements on equivalent noise level, observation on noise type, and interview on residents' responses. The results are as follows. 1) Averages of indoor noise levels of subject houses were measured as $43.9{\sim}62.2\;dB(A)_{Leq5min}$, the average of each house except one was higher than the permissible level, 45 dB(A). 2) The noise types observed were mostly residents' living noise and classified as 'water hammer', 'living equipment noise', 'noise by family', 'hood noise', and 'kitchen noise' in own unit, 'walking and talking noise in stairs and corridors', 'noise by neighborhood house', 'noise by the upper story' in building, and outdoor noise. 3) The residents show slightly non-positive responses at 'noise by the upper story', 'noise by neighborhood house', 'water hammer', and 'noise by family'. Therefore, it is required to plan for preventing deterioration of the sound environment quality by residents' living noise in own unit as well as by neighborhood houses.

• Steel and Composite Structures
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• 제33권1호
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• pp.1-18
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• 2019

In the present study, the behavior of steel plate shear walls (SPSW) with variable column flexural stiffness is experimentally and numerically investigated. Altogether six one-bay one-story specimens, three moment resisting frames (MRFs) and three SPSWs, were designed, fabricated and tested. Column flexural stiffness of the first specimen pair (one MRF and one SPSW) corresponded to the value required by the design codes, while for the second and third pair it was reduced by 18% and 36%, respectively. The quasi-static cyclic test result indicate that SPSW with reduced column flexural stiffness have satisfactory performance up to 4% story drift ratio, allow development of the tension field over the entire infill panel, and cause negligible column "pull-in" deformation which indicates that prescribed minimal column flexural stiffness value, according to AISC 341-10, might be conservative. In addition, finite element (FE) pushover simulations using shell elements were developed. Such FE models can predict SPSW cyclic behavior reasonably well and can be used to conduct numerical parametric analyses. It should be mentioned that these FE models were not able to reproduce column "pull-in" deformation indicating the need for further development of FE simulations with cyclic load introduction which will be part of another paper.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2003년도 학술.기술논문발표회
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• pp.143-146
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• 2003

Tall Buildings have been popular in recent years. Tall buildings require special consideration to design and construction due to their structural features. Column shortening is one of the important technologies to be considered in. The long-term deformations of concrete cause vertical shortening on cores and columns, trigger deformations on cladding, partitions and finishes, and damage their serviceability. This also affects structural stability by inducing unexpected stress to the structural members such as outrigger. The main objective of this paper is to re-evaluate column shortening according to revised field information and to compare the analysis results with the actual field measurement. Mok-Dong Hyperion, a 69-story apartment building which is currently under construction, was chosen for the case study.

• Structural Engineering and Mechanics
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• 제76권6호
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• pp.751-763
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• 2020

Available records of recent earthquakes show that near-field earthquakes have different characteristics than far-field earthquakes. In general, most of these unique characteristics of near-fault records can be attributed to their forward directivity. This phenomenon causes the records of ground motion normal to the fault to entail pulses with long periods in the velocity time history. The energy of the earthquake is almost accumulated in these pulses causing large displacements and, accordingly, severe damages in the building. Damage to structures caused by past earthquakes raises the need to assess the chance of future earthquake damage. There are a variety of methods to evaluate building seismic vulnerabilities with different computational cost and accuracy. In the meantime, fragility curves, which defines the possibility of structural damage as a function of ground motion characteristics and design parameters, are more common. These curves express the percentage of probability that the structural response will exceed the allowable performance limit at different seismic intensities. This study aims to obtain the fragility curve for low- and mid-rise structures of reinforced concrete moment frames by incremental dynamic analysis (IDA). These frames were exposed to an ensemble of 18 ground motions (nine records near-faults and nine records far-faults). Finally, after the analysis, their fragility curves are obtained using the limit states provided by HAZUS-MH 2.1. The result shows the near-fault earthquakes can drastically influence the fragility curves of the 6-story building while it has a minimal impact on those of the 3-story building.

• 디지털콘텐츠학회 논문지
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• 제16권3호
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• pp.425-436
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• 2015

스토리텔링에 이어 최근 화제가 되고 있는 것은 스토리두잉이다. 스토리텔링의'이야기하기'에서 스토리두잉의'이야기행하기'기법이 여러 분야에서 다양한 방법으로 활용되고 있다. 생산자가 가치로 여기는 메시지가 있고, 이것을 뒷받침하기 위한 이야기, 사용자의 행동을 유도하는 어포던스를 수용자는 지각하고, 직접 체험을 통해 메시지를 확인하며, 다시 생산자는 사용자의 체험과정을 평가하는 순환구조를 통해 기업의 제품홍보, 브랜드이미지 강화, 메시지와 가치를 전달한다. 결국, 스토리두잉은 사용자 경험을 기반으로 하여 움직인다. 이에 본 연구에서는 존 듀이의 경험이론을 바탕으로 사용자 경험의 주요 특징인 상호작용성과 연속성이 스토리두잉을 어떻게 작동시키는지를 파악하기 위해 스토리두잉의 개념, 스토리두잉의 국내외 현황, 스토리텔링과 스토리두잉의 차이, 스토리두잉의 구성요소와 사용자 경험의 관계, 그리고 스토리두잉의 작동원리의 순으로 연구를 진행하였다. 그 결과 스토리두잉은 메시지, 이야기, 등장인물, 행동, 확인의 5가지 구성요소를 가지고, 생산자와 수용자 사이의 상호작용과 연속성으로 작동됨을 알 수 있었다. 따라서 본 연구에서의 스토리두잉 본질 파악을 통해, 새로운 문화산업 트렌드를 밝혔고, 현재 기업과 브랜드 이미지 홍보를 주목적으로 하는 스토리두잉을 적용 범위를 확대하여 콘텐츠 분야에서도 사용할 수 있다는 가능성을 모색하였고, 스토리텔링과 스토리두잉의 이론적 차이를 제시했다는 점에서 본고가 사회문화적, 산업적, 학술적으로 의의가 있다.

• Structural Engineering and Mechanics
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• 제72권4호
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• pp.443-454
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• 2019

In order to reduce the residual drift of a structure in structural engineering field, a combined structural system (dual) consisting of steel buckling-restrained braced frame (BRBF) along with shear wall is proposed. In this paper, BRBFs are used with special reinforced concrete shear walls as combined systems. Some prototype models of the proposed combined systems as well as steel BRBF-only systems (without walls) are designed according to the code recommendations. Then, the nonlinear model of the systems is prepared using fiber elements for the reinforced concrete wall and appropriate elements for the BRBs. Seismic responses of the combined systems subjected to ground motions at maximum considered earthquake level are investigated and compared to those obtained from BRBFs. Results showed that the maximum residual inter-story drift from the combined systems is, on average, less than half of the corresponding value of the BRBFs. In this research, mean of absolute values of the maximum inter-story drift ratio demand obtained from combined systems is less than the 3% limitation, while this criterion has not been fulfilled by BRBF systems.

• Progress in Superconductivity
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• 제1권1호
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• pp.68-72
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• 1999

Since the discovery of high Tc superconductors, great efforts have been focused to develop high performance HTS magnets for the ultimate applications to power system devices. Magnet designers, however, have had difficulties in the estimation of the maximum operating current of the designed magnet from the tested short sample data, due to the degradation of the critical current density in the magnet. Similar story applies to the HTS electrical bus bar. It has been found that the critical current of Bi-2223 stacked tapes is much less than the total summation of critical currents of each tape, which is mainly attributed to the self magnetic fields. Furthermore, since the critical current degradation of Bi-2223 tape is greater in the normal magnetic field (to the tape surface) than in the parallel one, detailed magnetic field configurations are required to reduce the self field effects. In this paper, we calculate the self field effects of a stacked conductor, defining self field factors of normal and parallel magnetic fields to the tape surface. Finally, the critical current degradations in the HTS magnet are explained by the introduced self field factors of the stacked conductor.